It's important to be careful with Stevia...especially if you're allergic to ragweed. I found this out the hard way a couple weeks ago. I'd never encountered the product before and gave it a try to sweeten some hot tea w/o knowing what it was. I used "natural liquid stevia." Shortly after using it, my face bloated up like a balloon, I was covered in hives, and my airway was shutting down. Scary stuff. I had to take 4 Benadryl to keep myself out of the ER. Personally, I think they should put a warning label on it for people with ragweed allergies...it's pretty common.